A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5975-01-392-2211
NSN 6105-01-430-0127
NSN 6150-01-211-2744
NSN 6220-01-570-9602
NSN 5905-01-026-8793
NSN 6320-01-147-9177
NSN 5915-00-216-8185
NSN 5990-00-428-1895
NSN 5895-01-273-8847
NSN 5985-00-229-8788
NSN 5945-01-281-7404
NSN 5835-00-698-9824